This article studies progressive failure and ultimate strength prediction of sandwich composite hat-stringer-stiffened panels subjected to the transverse in-plane loads. By using the finite element software ABAQUS and the nonlinear finite element method, a failure criterion and a rigid degradation mode of interwoven fibers have been found, a set of finite element analysis methods for predicting the ultimate strength of sandwich composite hat-stringer-stiffened panels has been established. It has been verified the better accuracy of this method in predicting the ultimate strength and mechanical properties of sandwich composite hat-stringer-stiffened panels by comparing with the experimental results. Finally, the paper analyzes some factors affecting the numerical simulation of progressive failure and ultimate strength and discusses how to improve the accuracy of predicting the behavior of sandwich composite hat-stringer-stiffened panels.

本文研究了承受水平面内载荷的夹芯复合帽梁加劲板的渐进破坏和极限强度预测。通过使用有限元软件ABAQUS和非线性有限元方法，发现了交织纤维的破坏准则和刚性降解模式，并提出了一套用于预测夹芯复合帽梁加筋板极限强度的有限元分析方法。已经建立。通过与实验结果的比较，已经证明了该方法在预测夹芯复合帽纵梁加劲板的极限强度和力学性能方面的更好的准确性。最后，